Firemin will force Firefox to use less memory. It is safe to use, spyware free
and completely free. Firemin Installs instantly.

Mozilla claims to have improved the memory usage of Firefox significantly. In
fact, they seem to be proud of the fact that involuntary memory leaks are
totally eliminated. This is all strange, because while I'm busy writing this
article, my Firefox is using between 250MB and 300MB of memory. As a side
note; I am using the latest Firefox version.

Firefox still uses more memory than most other web browsers. Truthfully, the
amount it uses is ridiculous. Firefox can use up to 500MBs of memory if you
keep it running. In addition, you will see that the memory usage keeps rising
because of, you guessed it, memory leaks. Some Firefox users even reported
memory usage over 1000MBs. That is half of the memory gone on most computers.

So, is there a solution? The answer is simple, Firemin. You will see its
effectiveness almost instantly and the best part is that it is completely
free. To use Firemin; you will need to download the Firemin.exe file,
decompress it and run Firemin.exe from the extracted folder.